Products
High-efficiency Downhole Milling Tools
Product Material
Take flat bottom mill shoes as an example:
The main body adopts high-performance alloy steel(4145H) to ensure the smooth and effective operation under various drilling pressure and rotary speed situation. Meanwhile, we adopt high level tungsten carbide meterial to achieve fast milling. Stabilizer and outside skirt for junk mill and taper mill can be designed as need.
Tungsten carbide insert
·Superloy
Good filler for watermelon, string and taper mills.
Good back for junk mills.
Wide range of sizes available.
Most rugged.
· Metal Muncher
Mills faster than conventional milling tools.
Reduces required drilling pressure while milling.
Leaves smoother cuts with no lips for debris to hang on.
Produces debris with similar size.
Cutting metal instead of grinding it.
· Opti-cut
Smaller debris.
Faster ROP.
Longer life.
Lower pressure and torque requirements.
16 cutting points and 8 cutting edges for each cutter.
Product Category
Concave/Flat/Blade Bottom junk mill
Used for milling bit, cone, diameter gauge, grapple teeth, wash pipe, drilling tool joint, deep well pump accessories, packer, water distributor and other longer drilling tools.
Petrozhr junk mill are available in various configurations and geometries. Our advanced mill engineering and experienced welder ensure a consistent and durable cutting structure on every junk mill.
Tab. 1 Flat/Concave/Blade Bottom junk mill parameter
|
Borehole Dia. Mill Shoe OD Recommended Length (mm) (mm) Screw Thread (mm) |
P.N.
Flat |
P.N. Concave |
P.N. Bladed |
| 95.2- 101.6 89 2-3/8REG 250 | JM089FX | JM089CX | JM089BX |
| 107.9- 114.3 97 2-3/8REG 250 | JM097FX | JM097CX | JM097BX |
| 117.5- 127 110 2-7/8REG 250 | JM110FX | JM110CX | JM110BX |
| 130- 139.7 121 2-7/8REG 250 | JM121FX | JM121CX | JM121BX |
| 142.9- 152.4 130 2-7/8REG 250 | JM130FX | JM130CX | JM130BX |
| 155.6- 165. 1 140 3- 1/2REG 250 | JM140FX | JM140CX | JM140BX |
| 168- 187.3 156 3- 1/2REG 250 | JM156FX | JM156CX | JM156BX |
| 190.5-209.5 178 3- 1/2REG 250 | JM178FX | JM178CX | JM178BX |
| 212.7-241.3 200 4- 1/2REG 250 | JM200FX | JM200CX | JM200BX |
| 244.5-269.9 232 4- 1/2REG 250 | JM232FX | JM232CX | JM232BX |
| 273-295.3 257 6-5/8REG 250 | JM257FX | JM257CX | JM257BX |
| 298.5-317.5 279 6-5/8REG 250 | JM279FX | JM279CX | JM279BX |
| 320.6-346. 1 295 6-5/8REG 250 | JM295FX | JM295CX | JM295BX |
| 349.3-406.4 330 6-5/8REG 250 | JM330FX | JM330CX | JM330BX |
| 406.4-444.5 381 6-5/8REG 250 | JM381FX | JM381CX | JM381BX |
Rotary Shoe
Rotary shoe adopts carbide material inside the cylinder to circumferentially cut irregular fish top, and gradually repair the damaged fish top into a circle, such as tubing, casing body, etc.
[Note: Because the inner milling tooth diameter of rotart shoe is large, the reverse torque is large, so low pressure and slow rotation mode should be adopted in the use of rotary shoe. In general, the drilling pressure should not exceed 10 KN and the rotational speed should not exceed 50 r/min.]
Type A
Cut metal,cement and formation.
Cutting on OD and bottom.
Type B
Cutting metal where clearance is small.
Cutting on ID and bottom.
Type C
Cut formation.
Cutting on OD and bottom.
Type D
Cut formation and fish at the same time.
Cutting on ID,OD and bottom.
Tab.2 Rotary shoe parameter
|
Casing/Wellbore Dia. |
Rotary shoe OD (mm) |
Rotary shoe Length (mm) |
Recommanded Screw Thread |
P.N. Rotary Shoe |
|
| 4in | 101.6mm | 95 400 | FJWP | TXX095 | |
| 5- 1/2in | 139.7mm | 114 500 | FJWP | TXX114 | |
| 5-3/8in | 146.05mm | 118 500 | FJWP | TXX118 | |
| 6-5/8in | 168.28mm | 136 425 | FJWP | TXX135 | |
| 7in | 177.8mm | 152 450 | FJWP | TXX152 | |
| 7-5/8in | 193.68mm | 160 450 | FJWP | TXX160 | |
| 8-5/8in | 219. 1mm | 185 550 | FJWP | TXX185 | |
| 12- 1/4in 311. 15mm | 203 450 | FJWP | TXX203 | ||
| 15-5/8in 396.88mm | 298 450 | FJWP | TXX298 | ||
| 20in | 508mm | 406 450 | FJWP | TXX406 | |
Taper Mill
Taper mill reams out restrictions,collapsed casing and liner sections and deburr whipstock windows and casing.The low end of taper mill,with its small,diameter enters the collapsed casing and liner.Then slightly spiraled reamer edges to mill away the under section to full mill diameter.
Taper mill consists of a conical body and tungsten carbide. The taper of the body is 30 degrees, the cone is wing-shaped, and the surface is hardfacing or inlaying tungsten carbide.
Tab.3 Taper mill parameter
|
Borehole Dia. Taper mill OD Recommanded Length
(mm ) (mm ) Screw Thread (mm ) |
P.N.
Taper mill |
||
| 95- 101.6 | 89 | 2-3/8REG 300 | XZ089 |
| 107.9- 114.3 97 2-3/8REG 300 | XZ097 | ||
| 117.5- 127.0 110 2-7/8REG 300 | XZ110 | ||
| 130- 139.7 121 2-7/8REG 300 | XZ121 | ||
| 142.9- 152.4 130 2-7/8REG 300 | XZ130 | ||
| 155.6- 165. 1 140 3- 1/2REG 300 | XZ140 | ||
| 168- 187.3 156 3- 1/2REG 300 | XZ156 | ||
| 190.5-209.5 178 3- 1/2REG 300 | XZ178 | ||
| 212.7-241.3 200 4- 1/2REG 300 | XZ200 | ||
| 244.5-269.9 232 6-5/8REG 350 | XZ232 | ||
| 273-295.3 257 6-5/8REG 350 | XZ257 | ||
| 298.5-317.5 279 6-5/8REG 350 | XZ279 | ||
| 320.6-346. 1 295 6-5/8REG 350 | XZ295 | ||
| 349.3-406.4 330 6-5/8REG 350 | XZ330 | ||
| 406.4-444.5 381 6-5/8REG 350 | XZ381 | ||
Watermelon String Mill
Watermelon string shoe is one of the milling tools in sidetracking operation. It is used for repairing casing, reaming and opening channels. It is usually used immediately after opening windows. The milling edge (working area) of the watermelon mill contacts the borehole wall, and the end of each edge is designed as a cone. When the window is being opened, the watermelon mill can lengthen the window from the top and remove the scaling and burrs left on the pipe wall during the initial cutting.
Tab.4 Watermelon string mill parameter
| Borehole Dia. Screw (mm/in ) Thread |
Working Area OD (mm/in ) |
Working Area Length (mm/in ) | Totul Length (mm/in ) | P.N. |
| 139.7 (5- 1/2) NC 26 112 (4-7/ 16) 600 (23-5/8) | 1130 (44) | XGMX112 | ||
| 139.7 (5- 1/2) NC 26 116 (4-9/ 16) 600 (23-5/8) | 1130 (44) | XGMX116 | ||
| 139.7 (5- 1/2) NC 26 118 (4-5/8) 600 (23-5/8) | 1130 (44) | XGMX118 | ||
| 139.7 (5- 1/2) NC 31 120 (4-3/4) 600 (23-5/8) | 1280 (50) | XGMX120 | ||
| 146.0 (5-3/4) NC 31 124 (4-7/8) 600 (23-5/8) | 1280 (50) | XGMX124 | ||
| 168.3 (6-5/8) NC 31 142 (5-9/ 16) 600 (23-5/8) | 1280 (50) | XGMX142 | ||
| 177.8 (7) NC 31 151 (5- 15/ 16) 600 (23-5/8) | 1280 (50) | XGMX151 | ||
Pilot mill
Pilot mill are designed for milling casing ,liner,rotary shoe or large ID tubing. The cutting blades dressed with high class tungsten carbide material make Petrozhr pilot mill could achieve fast penetration with minimal wear.The small and curled cutting debris is easy to remove. And the pilot end is used to stabilize in the ID of the object that being milled.
Tab.5 Pilot mill parameter
|
Borehole Dia. (mm ) |
Screw Thread |
Working Area OD (mm ) |
Cutting blade Length (mm ) |
Pilot area Length (mm) |
P.N. |
| 153 2 3/8REG | 130 200 | ≧45 | LYMX130 | ||
| 165 2 3/8REG | 140 200 | ≧45 | LYMX140 | ||
| 187 3 1/2REG | 156 200 | ≧55 | LYMX156 | ||
| 210 4 1/2REG | 178 200 | ≧55 | LYMX178 | ||
| 241 4 1/2REG | 200 200 | ≧55 | LYMX200 | ||
| 270 4 1/2REG | 232 200 | ≧55 | LYMX232 | ||
| 295 6 5/8REG | 257 250 | ≧55 | LYMX257 | ||
| 317 6 5/8REG | 279 250 | ≧55 | LYMX279 | ||
| 346 6 5/8REG | 295 300 | ≧55 | LYMX295 | ||
| 406 6 5/8REG | 330 300 | ≧55 | LYMX330 | ||
| 445 6 5/8REG | 331 300 | ≧55 | LYMX331 | ||
Tungsten carbide application chart
| Recommanded application | Superloy | Opti-cut | Metal-muncher | Metal-muncher
with Superloy |
| Washover open hole | √ | √ | ||
| Washover drill pipe | √ | |||
| Washover gravel pack | √ | √ | ||
| Washover liner trim | √ | |||
| Washover packer | √ | |||
| Poilt milling | √ | |||
| Loose Junk milling | √ | √ | ||
| Stationary packer or pipe or tubingjunk milling | √ | |||
| Watermelon milling | √ | |||
| String milling | √ |
Fishing Item Pictures
Room 703 Building B, Greenland center, Hi-tech development zone Xi’an, China
86-13609153141
